I'd love solar, but would go for UPS, because connected to the grid means you go out with the grid and it seems that at the moment you can't have have both. Unfortunately, UPS system is looking around $20,000.
I'm a real tight ass on electricity usage. Everything gets switched off at the mains when it's not in use, so even the LEDs don't light up! Even the Wi-Fi is off at night or if we're out. The only things on permanently are fridge, freezers and the cordless phone.
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I priced up a totally off-grid system but can't afford it. I hope to do it one day though. It's good to look at hidden power usage in the home as cutting it back can really save some power and money. We've been doing similar for a while now.